Here, half way up a mountain, the temperature can drop to minus 12 degrees Celsius, which has serious implications for any static water.

The ‘Blue Pig’ water storage tank is one of several vulnerable structures which need to be insulated, and today was a good dry, windless day to do it.

The 'Blue Pig' water storage tank under its tarpaulin

We use the tarpaulin which came with the indoor pool, folded in half. It looks a bit like a Swiss cheese in the parts where mice have nibbled away shavings to make bedding.

After wrapping bubble wrap round the inlet and outlet pipes, we spread the tarpaulin over the top of the tank and weigh it down with logs, blocks and boulders. It takes that much to stop it taking off before the north wind like a giant green bat.

The Blue Pig sits on 2 concrete fence posts laid horizontally so that it’s clear of the ground. It’s sited at the top of a bank just above an oak tree and a couple of pine trees which, in the event of some catastrophe, would stop it from tumbling into the valley. We tie the tarpaulin to these trees.

The tarpaulin isn’t quite big enough double, but would be far too big if it were single. There’s a gap at the back where the folds don’t quite meet, and here we stuff sacks of dead leaves.

Underneath this contraption, the spring will continue to flow through to the pond. When it’s running full bore in the depths of winter, water will come out from under the lid of the Blue Pig and there’ll be a little waterfall down the bank.

Today I found more evidence of the resident mice who built a nest in the air filter housing of our car – see Mouse on wheels.

Walnuts nibbled by mice

They’ve been biting great holes in the fallen walnuts and eating the kernels, sometimes leaving them completely hollow.

I’m getting an idea of their daily routine now.

They spend their days tucked up nice and cosy under the car bonnet or in the bubble wrap of the pool pump house then, at night, they sally forth and eat our walnuts. Or our hazelnuts (we never get any – they get them all), figs, apples, crocus bulbs …

We are a sort of grand mouse charity.

One found its way into the house, once.

We spent ages luring it into a humane trap, night after night, trying different locations and different baits, while it continued to use the back of the cupboards as a super-highway.

Eventually I heard the cage door snap shut and there it was inside, looking back at me. After leaving it a moment while I made preparations to take it right away from the house, I came back and it had gone. It had compressed its skeleton and slipped through the bars.

After that we got a traditional mouse trap which took one night to do the business.

Mice are fine so long as they don’t come into the house, or damage the car or the pool equipment. Other than that, I guess there’s room for everyone.

Out shopping in Valtopina, one of the ‘vigili’ (town police) threatened to put a ticket on our parked car if we didn’t move it fractionally away from a junction. At the same time he pointed out that we were losing liquid – brake fluid, he said.

The bed under the bonnet

Back home, we confirmed that it was in fact washer fluid leaking from the jets in front of one of the headlamps.

Our handy friends went in behind the headlamp and discovered, in the air filter housing, a pile of small pieces of foam and plastic. These had obviously been scuffed up directly from there, and also brought in from various other places as evidenced by nibble marks. It was a mouse’s nest.

So that was why the dogs had been sniffing under the front of the car!

Those little perisher mice must have felt safer there than in the weep holes of the wall which is where they normally hang out – assuming it’s all the same tribe.